Rolling-mill.



PATENTED APR. '7, 1 908.

A. T. KELLER.

ROLLING MILL.

APPLICATION FILED AUG.22, 1907.

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No. 884,278. PAT ENTED APR. '7, 1908.

A. T. KELLER, ROLLING MILL.

APPLICATION FILED AUG.2 2, l907.

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UNITED STATES ATNT OFFICE.

ALBERT T. KELLER, O1 PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TOMESTA MACHINE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OFPENNSYL- VAN IA.

ROLLING-MILL.

Specification of Letters Patent.

Patented April '7, 1908.

To all whom it may concern:

Be it known that I, ALBERT T. KELLER, of Pittsburg, Allegheny county,Pennsylvania, have invented a new and useful Improvement inRolling-Mills, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, in which Figure 1 is a front elevation,partly broken away and artly in section of a portion of a rolling miembodying my invention; and Fig. 2 is a side elevation of the same, witha portion of the frame in section.

My invention has relation to rolling mills and more particularly to newand useful means for counterbalancing the movable upper roll and forholding its boxes or bearings against the holding-down screws; and isdesigned to provide a simple and effective device of this character inwhich the counterbalance and its connections are arranged entirelyoutside of the roll housings, thereby facilitating the assemblage of theparts and access thereto.

The precise construction of my invention will be best understood byreference to the accompanying drawings, it being premised, however, thatvarious changes may be made in the details of construction andarrangement of the parts by those skilled in the art without departingfrom my invention as defined by the appended claims.

While in these drawings I have shown my invention as applied to athree-high mill it is equally applicable to two-high mills in which thetop roll is adjustable.

Referring to these drawings, the numeral 2 designates the roll housings,3 the bottom roll, 4 the vertically movable middle roll and 5 thevertically adjustable top roll which is mounted in the boxes or bearings6 which are arranged to slide vertically in guides in the housingwindows.

7 designates actuating connections of any suitable character for raisingand lowering the middle roll.

8 designates holding-down screws for the top roll which may be actuatedin any usual suitable manner, as by the motor 9 through the spur gear 10and worm gearing 11.

12 designates two parallel bars which extend across the mill above thetop roll, said bars being spaced from each other, and having their endsextending through the windows of the roll housings. The extended endportions of these bars are connected outside the roll housing by rods orbolts 13 which hold the bars in square and which also serve as the meansof attachment for the counterbalancing connections, as hereinafterdescribed. The end portions of the bars are also each rigidly connectedto the boxes by the lifting rods 14 whose upper ends are secured in thebars, and whose lower ends are beyond, or otherwise secured to the lowerportions of the boxes 6, as shown at 15. Sleeved on each projecting endof each of the bolts 18 is a link 16 which is connected at its lower endto the short arm of a counterweighted lever 17 fulcrumed at 18.

19 designates vertical plates bolted to the housings at each side of thehousing windows and extending inwardly over the ends of the roll boxesto retain the same in the roll housings. These plates are also extendedto form bearing surfaces for rollers 20 which are loosely mounted on theend portions of the rods or bolts 13, which reduce the friction, andwhich also serve to prevent any swaying or endwise movement of the bars12.

The operation will be readily understood. The counterweighted levers 17maintain a constant upward pressure on the links 16 thereby raising thebolts or rods 13 and holding the boxes 6 of the top roll against theholding-down screws 8.

The advantages of my invention result from the construction andarrangement of the parts whereby the counterbalances and theirconnections are arranged entirely exteriorly of the roll housings,thereby obviating the difiiculties of getting the connections up throughor within the roll housings. Also from the fact that the parts are morereadily accessible and from the simplicity and effectiveness of theconstruction and arrangement.

What I claim is 1. In a rolling mill, roll housings, a top roll,vertically movable boxes or bearings therefor, rigid connections betweensaid boxes or bearings extending through the housing windows to theouter side of the housings, and counterbalancing devices connected tothe extending ends of the connections; substantially as described.

2. In a rolling mill, a housing, a top roll, vertically adjustable boxesor bearings therefor, a rigid connection between the same having itsends extending beyond the outer side of the roll housing, andcounterbalances connected to the extended ends thereof; substantially asdescribed.

3. In a rolling mill having a vertically adjustable top roll andholding-down screws therefor, bars extending parallel with the rollaxes, said bars having their ends extended through the housing windowsand exteriorly of the roll housings, rods or bolts connecting suchextended ends at each side of the mill, lifting connections from thebars to the lower portions of the boxes or bearings for the top roll,and forming, with the bars, rigid connections between said boxes andbearings and counterweighted levers connected to said rods or bolts;substantially as described.

4. In a rollin mill having a vertically adjustable top r0 1 andholding-down means therefor, rigid connections for the boxes of the toproll extending through the windows of the roll housings, rods or boltsconnecting such extensions and having bearings against the rollhousings, and lifting connections connected to said rods or bolts;substantially as described.

In testimony whereof, I have hereunto set my hand.

ALBERT T. KELLER. Witnesses GEO. B. BLEMING, GEO. H. PARMELEE.

